Make header image full width

I’ve used an image in my header on a page (not front page) I want to get this to fill the entire width of the page but I can’t get it to do so.

Does anyone have a solution to this?

Any help is greatly appreciated.


Please try this CSS code below:

div#panel-1134-0-0-0 img {
  width: 100%;


You’re a genius thank you Awan!